#3 Belgium, Belgium, Belgium, Belgium and Belgium
Chris Coleman faced Belgium five times during his managerial career with Wales, and only experienced one defeat. In addition to two draws, two victories against one of the most talented collections of individual players in the world game proved to be two of the most memorable occasions of his tenure, with the latter taking Wales to the semi-finals of EURO 2016.
A frustrating start to Coleman's tenure saw Belgium claim a 2-0 win in Cardiff in the opening 2014 FIFA World Cup qualifier in Cardiff in September 2012. However, there would be signs of progress apparent a year later as a late equaliser from Aaron Ramsey earned Wales a point in Brussels in October 2013. Roll forward another year to the next qualifying campaign, and Wales would keep a clean sheet in a 0-0 draw.
Belgium then headed to Cardiff in June 2015 for what was now a key game at the top of the EURO 2016 qualifying group. A capacity crowd had bought into Wales' excellent start to the campaign, and there was a genuine excitement about what this team could achieve. Gareth Bale scored the only goal of the game to earn Wales an incredible victory and the greatest of Chris Coleman's career to date.
The two sides would meet again at the EURO 2016 finals in France as the teams were paired against each other at the quarter-final stage. Radja Nainggolan put Belgium ahead, but goals from Ashley Williams, Hal Robson-Kanu and Sam Vokes sealed one of the most famous victories in Welsh football history. The character of the side was never epitomised quite like it was that night in Lille.